The Dow Chemical Company

Robert E LaPointe

David D Devore

Peter N Nickias

David R Neithamer

James C Stevens

Jerzy Klosin

David R Wilson

William Jack Kruper, Jr

Richard E Campbell, Jr

Robert K Rosen

Eugene Y Chen

Theodore E Miller, Jr

Ray W Chrisman

Robert D Mussell

Grant B Jacobsen

Charles A Nielsen

Supported catalyst comprising expanded anions

A thermal method for studying chemical responses, such as catalyzed polymerization reactions that includes the following three steps. The first step is to flow a chemical substance through a conduit, the conduit being in thermal communication with an electrical conductor, the electrical conductor being co-linear with the conduit, the electrical resistance of the electrical conductor being a function of the temperature of the electrical conductor. A length of stainless steel tubing can be used as both the conduit and the conductor. The second step is to flow electricity through the electrical conductor during the first step. The third step is to measure the electrical resistance of the electrical conductor during the second step to determine any change in the temperature of the conduit caused by a response of the chemical substance. An apparatus for studying chemical reactions that includes: a first conduit, the first conduit being an electrical conductor, the first conduit having a first end and a second end, the electrical resistance of the first conduit being a function of the temperature of the first conduit; a source of electricity, the source of electricity in electrical communication with the first conduit so that electricity can be flowed through the first conduit; a volt meter in electrical communication with the first conduit so that the voltage measured by the volt meter is an indication of the temperature of the first conduit.

Thermal method and apparatus

Catalyst activators comprising expanded anions

The monoether adduct of a tri(fluoroaryl)aluminum compound is prepared by an exchange reaction between a trihydrocarbylaluminum compound and a tri(fluororaryl)borane compound in a hydrocarbon solvent in the presence of a C.sub.1-6 aliphatic ether in an amount from 0.9 to 1.0 moles per mole of aluminum.

Process for preparing trifluoroarylaluminum etherates

A process for preparing tris(pentafluorophenyl)borane, the steps of the process comprising:

Preparation of tris (pentafluorophenyl) borane

A process for preparing addition polymerization catalysts having a limiting charge separated structure corresponding to the formula:

Homogeneous olefin polymerization catalyst by abstraction with lewis

Catalyst systems useful in addition polymerization reactions comprising a Group 4 metal complex and a silylium salt activating cocatalyst are prepared by contacting the metal complex with a silylium salt of a compatible, non-coordinating anion, optionally the silylium salt is prepared by electrochemical oxidation and splitting of the corresponding disilane compound.

Silylium cationic polymerization activators for metallocene complexes

Addition polymerization catalysts comprising a derivative of a Group 4 or Lanthanide metal compound prepared by oxidative activation, a process for preparation and an addition polymerization method utilizing such catalysts.

Addition polymerization catalyst with oxidative activation

Addition polymerization catalysts comprising a derivative of a Group 4-8 metal compound prepared by metal center oxidation.

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Midland, MI, United States of America

Robert E LaPointe